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将2,3-二醛基氧化纤维素的6位羟基先用二氯亚砜氯化,然后多胺化反应制备二乙烯基三胺基氧化纤维素(YXA2.3)。对其进行了元素分析、IR光谱分析和光电子能谱检测,并在透析液和纯水中对尿酸和砷(Ⅲ)分别进行了吸附实验。结果表明,在纯水中,当尿酸浓度为1.0 mg.L-1、吸附温度为37℃、透析液pH值为7,动态吸附实验在8 h时达到吸附平衡,平衡时吸附容量为20.5 mg.g-1;当砷(Ⅲ)浓度为20.0μg.mL-1透析液时,动态吸附实验均在8h达到吸附平衡,平衡时吸附容量分别为411.0μg.g-1。由此可知所研制二乙烯基三胺基氧化纤维素具有分别吸附尿酸和三价砷的功能。
The 6-hydroxyl group of 2,3-dialdehyde-based oxidized cellulose was first chlorinated with thionyl chloride and then polyamidated to prepare divinyltriamine-based oxidized cellulose (YXA2.3). Elemental analysis, IR spectroscopy and photoelectron spectroscopy were used to detect uric acid and arsenic (Ⅲ) in dialysate and pure water respectively. The results showed that when the concentration of uric acid was 1.0 mg.L-1, the adsorption temperature was 37 ℃ and the pH value of dialysate was 7 in pure water, the adsorption equilibrium was reached at 8 h in dynamic adsorption experiment. The equilibrium adsorption capacity was 20.5 mg . When the arsenic (Ⅲ) concentration was 20.0μg.mL-1, the dynamic adsorption experiments reached the equilibrium of adsorption at 8h, and the equilibrium adsorption capacities were 411.0μg.g-1. It can be seen that the developed divinyltriamine-based oxidized cellulose has the function of adsorbing uric acid and trivalent arsenic respectively.